Inclosed fuse.



UNITED STATES PATENT OFFICE.

HAROLD G. BAXTER, 0F WILKINSBUBG, PENNSYLVANIA, ASSIGNOR T0 WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

mcLosEn FUSE.

To all whom it may concern. I

Be it known that I, HAROLD G. BAXTER, a subject of the King of Great Britain, and a resident of Wilkinsbur in the county of Allegheny and State of ennsylvania, have invented a new and useful Improvement in Inclosed Fuses, of which the following is a specification.

My invention relates to inclosed fuses, and it has particular reference to fuses of the renewable t pe.

The object o my invention is to provide areliable and inexpensive inclosed fuse that shall be adapted for renewable use and shall embod means for visibly and plainly disclosing t e condition thereof.

I provide a casing having an insulating mem er therein for so suspending a fusible conductor that, when the same is fused, it will be plainly visible through an openin in the casing. I further provlde simple and inexpensive parts therefor that admit of ease of adjustment and of simplicity of manufacture.

In the accompanying drawings, Figural is a side elevational view of a fuse embodying my'invention; Fig.2 is an end elevational view of the fuse shown in Fig. 1; Fig. 3 is a side View, with the casing removed, of the fuse shown in Fig. 1; Fig. 4

is a bottom view, with the casing remove of the fuse shown in Figs. 1, 2 and? and Fig. 5 is a sectional view taken along the line V-V of Fig. 4.

A protective device or fuse 1 comprises a cylindrical casing 2,. an insulating memher 3, two terminal members 4 and 5, a

i fusible conductor 6 and two stationary contact members 7 and 8.

The insulating member 3 comprises two semi-cylindrical portions 9 and 10, that are oppositely disposed with respect to each other, with an openin to the portlons 9 and 10', respectively. The

11 therebetween. The two portions 9 an 10 conform to the casing 2, thereb serving as guides for the unitary remova le element comprising the members 3, 4 and 5 during the insertion and the removal thereof from the casing 2, and each is provided with a slit in which is inserted one of the terminal members 4 and '5. Rivets or pins 12 and 13 are provided for securin the terminal members4 and 5 pins 12 and 13 are preferably adapted to be riven into position so as to be readily re- Speciflcation of Letters Patent.

movable. The fusible conductor 6 is attached to the terminal members .4 and 5 by Patented Sept. 24, 1918.

Application filed November 25, 1814. Serial No. 874,W2. I

bolts 14 and it extends through the opening 11 in the insulating member 3 against relatively sharp edges therearound, substantially as shown in the drawings. By reason of tension in the conductor 6, the abrupt bends therein at the points where it engages the sharp edges of the'opening 11 tend to localize the arc to' the short section of .the conductor disposed in the opening 11.

The terminal members 4 and 5 are provided with notches 15 and 16, respectively,

for the reception of caps 17 and 18. The caps 17 and 18 severally comprise a cylindrical'portion 19 and a flanged portion 20 in which are cut diametrical notches 21. The notches 21 are of s uch size that they permit the caps to slide over the terminal members to engage the notches 15 and 16 which, in cooperation with the flanged portions 20, secure the ca s in position when thelyhare slightly turned? ing 22 that is covered with a thin transparent strip of paper and is disposed adjacent to the o ening 11 in the insulating member 3 for t e purpose of visibly indicatin the condition of the fusible conductor 6.

he opening 11 in the insulating member e casing 21s provided with an open- I 3 is adapted to have relatively sharp, edges so that, when the conductor 6 is fused, it

will tend to fuse within the opening 11. It I will be seen that the fuse or protective device embodying my invention may be cheaply constructed because the expensive operat ons usually performed in the manufacture of such fuses have been overcome, that is, the terminal members 4 and 5 may be stamped from sheet metal,-no ta pmg for the reception of screws is requir and the insulator 3 maybe molded from any of the well known insulating materials.

While I have shown my invention in a preferred form, it is not so limited, but is capable of various modifications wlthm the 500 e'of' the appended claims. 1

claim as my invention:

1. A fuse for an electnc circuit com rising a cylindrical casing, terminal mem ers, a non-conducting member attached to the said terminal members and having two ofiset semi-cylindrical-oppositel -disposed portions with an opening there etween, and a fusible conductor attached'to the terminal members and extending through the opening between the offset portions of the nonconducting member.

2., A fuse comprising a cylindrical cas-" in terminal members, a non-conducting ey indrical member having portions cut away at opposite ends,'and a lateral 0 ening therein between the'cut-away portions, and a fusible conductor disposed adjacent the cut-away portions and extending through the opening. 3. A fuse comprising a cylindrical casing, terminal members, a non-conducting cylindrical member having portions cut away at opposite ends and a lateral'opening therein between the cut-away portions, and a fusible conductor operatively connected to the terminal members and disposed adjacent the cut-away portions and in the opening therebetween. a

4. A protective device for electric circuits comprising a cylindrical casing, terminal members, a non-conducting member attached to the said terminal members and having two offset portions with an opening therebetween, and a fusible conductor attached to the terminal members and extending adjacent the opposite sides of the offset portlons and through the opening therebetween.

5. A fuse compfisinga cylindrical casing, terminal members, a non-conducting cylindrical member having a. cut-away portion at one end, an oppositely disposed cut-away portion at the other end and a lateral opening intermediate its ends, and a fusible conductor attached to the terminal members and disposed adjacent the cut-away portions of the non-conducting member.

6.- A protective device for electric circuits comprising an insulating member hay ing a semi-cylindrical portion at one end,

an oppositely disposed sem-cylindrical portion at the other end and an opening therebetween, terminals attached to the ends of the said: insulat' member, and a fusible conductor attaclie l to the said terminals and extending through the opening in the said insulating member.

7. A protective device for an electric circuit comprising an insulating member having a semi-cylindrical portion at one end, an oppositely disposed semi-cylindrical portion at the other end and an opening there- November 1914,

HAROLD G. BAXTER v W itnesses:

Wu. Rrnm, B. B. Hmm. 

